Recipe: Fish Bone And Seaweed Broth
Prep Time:
15 minutes
Cook Time:
45 minutes
Servings:
3 quarts bone broth
Ingredients
  • 10 cups cold water, divided
  • Three 2-inch pieces kombu
  • 3 tablespoons kosher salt
  • 4 pounds bones and heads from lean, white-fleshed fish (such as bass, fluke, snapper; 2 to 3 fish)
  • 1 tablespoon canola oil
  • 5 scallions, white parts cut into 1-inch pieces and green parts thinly sliced
  • 3-inch piece ginger, peeled and cut into ½-inch pieces
  • 2 garlic cloves, crushed
  • ½ cup sake
  • 1 tablespoon apple cider vinegar
  • ½ pound (2 cups) daikon, peeled and chopped into ¾-inch pieces
  • ½ cup loosely packed bonito flakes
  • Wakame Chazuke, to taste
  • Togarashi, to taste
Directions
  1. Fill a large bowl with 5 cups of cold water and add the kombu. Let sit for 1 hour.
  2. Fill a separate large bowl about halfway up with cold water. Add the salt, stirring to dissolve, and add the fish bones. If needed, cover with more cold water to submerge the fish. Let stand for 30 minutes. (This helps extract impurities.) Drain the fish and rinse under cold water, removing more impurities and stubborn veins. Break apart the bones, so they will fit into your pot later, and set aside.
  3. In a large, wide (8-quart) pot, heat the oil over medium-high heat and add the white scallion parts, ginger and garlic. Cook, stirring occasionally, until softened and translucent (no browning), 3 to 5 minutes.
  4. Add the fish heads, bones and sake, and cook until the sake is mostly reduced, 2 to 3 minutes. Add the kombu water (with the kombu), remaining 5 cups of water, apple cider vinegar and daikon, and bring to a bare simmer. Lower the heat to just below a simmer, add the bonito flakes and cook for 30 to 40 minutes, skimming off any foam that rises to the surface.
  5. Using a slotted spoon, strain out the daikon pieces and reserve. Strain the fish broth into a large bowl through a fine-mesh strainer and return the daikon to the broth. Ladle the bone broth into mugs and season to taste with the Wakame Chazuke and togarashi. Garnish with the thinly sliced green scallions and serve. If not using right away, skip the garnishes, let the broth cool and store in the fridge, covered, for up to 5 days and frozen for up to 3 months.